Answer by jay.sf for How can I calculate the number of uniques in a row...
You could first subset for columns with "uniques", lapply comparison greater than zero over remaining columns, finally identify which.> d |> subset(select=colSums(d > 0) == 1) |>...
View ArticleAnswer by tmfmnk for How can I calculate the number of uniques in a row...
If you want to return only the rows with unique values and the corresponding unique values:ind <- apply(example_data >= 1, 2, which)stack(ind[lengths(ind) == 1]) values ind1 3 Species32 5...
View ArticleAnswer by Maël for How can I calculate the number of uniques in a row within...
You can use colSums+rowSums like so:cbind(example_data, uniques = rowSums(example_data[colSums(example_data > 0) == 1] > 0))# Species1 Species2 Species3 Species4 Species5 uniques# 1 1 6 0 0 0 0#...
View ArticleAnswer by jpsmith for How can I calculate the number of uniques in a row...
Since you are interested in which rows have uniques and how many, not which species were uniques:You can find both the row and column indices of those with unique values by first finding which species...
View ArticleHow can I calculate the number of uniques in a row within a species matrix?
I am trying to identify which rows have uniques (a species that was only observed in that row and not in any other row of my species matrix). I have my data matrix set up with columns as individual...
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